Has the X Trans sensor just been outflanked?

Started Feb 21, 2013 | Discussions thread
love_them_all
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Re: Has the X Trans sensor just been outflanked?
In reply to 57even, Feb 23, 2013

57even wrote:

Apteryx6 wrote:

Nikon's replacement for the D7000 (and apparently for the D300S) will have a Bayer sensor, but will not have a low pass filter - http://www.dpreview.com/news/2013/02/21/Nikon-launches-D7100-24MP-mid-range-DSLR-with-51-point-af-and-no-optical-low-pass-filter

They are apparently able to do this because their experience with the D800E suggests that for sensors with that cameras pixel density or higher, moire is not a common issue. The D7100 has a 24MP sensor, suggesting that had Fuji waited till they had a similar sensor for the X Pro 1, they could have dispensed with the low pass filter without having to dispense with the Bayer sensor, and avoided the issues with RAW conversion that is discouraging many users and potential users.

Unlike the D800E, the D7100 will not be released alongisde in an alternative version that has a low pass filter, and that may be because its pixel denisty is even higher. But the lack of major moire problems with the D800E does suggest that even 16MP APS C Bayer sensors do not need a low pass filter (the D800E's sensor has a pixel density equal to a 15.1MP APS C sensor). Maybe Fuji never needed the X Trans sensor to eliminate the low pass filter?

It is true that Nikon believe D800E users (and prospective D7100 users) are knowledgeable enough to know when their images risk moire, and will either review the images to ensure they avoided it (and retake the image from a slightly different angle or distance if they didn't avoid it) or have software that will allow them remove it in PP. But that is probably true of X Pro 1 users anyway.

So was the X Trans sensor and its attendant RAW conversion issues really necessary?

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Apteryx

The D800e DOES have considerable issues with moire on all the relevent types of shot, and the D7100 will as well. Even my D600 does, and that has a filter.

But sure, if you don't shoot buildings or fashion shots you probably won't notice.

But before you think that Xtrans is merely to remove moire, do a noise comparison between the Fuji at ISO1600 and any of the other APSC SLRs.

Yup. Removing morie is just a by product for the X trans. The sensor has much please colors, sharpness (not just in terms of lines and edges but the pop like a well shot image from the Foveon). False color is reduced - very important, that has a direct relation in chroma noise reduction. The X trans interpolation for colors is clearly better than a bayer in similar specs.

Removing the AA filter is a bonus but not everything.

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